12637801613 has 2 divisors, whose sum is σ = 12637801614. Its totient is φ = 12637801612.

The previous prime is 12637801597. The next prime is 12637801621. The reversal of 12637801613 is 31610873621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11013872809 + 1623928804 = 104947^2 + 40298^2 .

It is a cyclic number.

It is not a de Polignac number, because 12637801613 - 2⁴ = 12637801597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12637801013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318900806 + 6318900807.

It is an arithmetic number, because the mean of its divisors is an integer number (6318900807).

Almost surely, 2^12637801613 is an apocalyptic number.

It is an amenable number.

12637801613 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637801613 is an equidigital number, since it uses as much as digits as its factorization.

12637801613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 12637801613 in words is "twelve billion, six hundred thirty-seven million, eight hundred one thousand, six hundred thirteen".